拖曳式水平鱼探仪海上试验研究

为了简化设备组成,方便操作使用,降低设备成本,对拖曳式水平鱼探仪采用了被动工作方式,利用监测鱼群噪声以确定鱼群方位。采用水平拖曳方式时,对拖体内两个矢量水听器所接收信号进行本船噪声抵消运算,有效地降低了本船噪声干扰,从而保证了必要的目标检测距离。利用矢量水听器所测得声压与质点振速的相关性,借助非线性最优化技术,按照单矢量水听器多目标定向方法,解算并输出显示各目标方位。根据具体要求,可以显示目标的地理方位,也可以显示目标相对于本船的方位。

Testing of towed horizontal fishery detector on the sea

Towed horizontal fishery detector works passively to detect the location of the shoals of fish through detecting their noises.It can simplify the equipment,facilitate the operation and reduce the cost as well.It offsets the signals received by the two vector hydrophones in the tow and reduces the noise interference from the ship to assure the target range.It can show the directions of targets through calculating the correlation between sound pressures and vector velocity detected by the vector hydrophones and using the non-linear optimizing technology for multi-sources detection by single vector hydrophone.It can indicate geographical azimuth of the target or the direction of the target to the ship if required.